Confronting 2016 and 2020 Polling Limitations
Looking at final estimates of the outcome of the 2020 U.S. presidential race, 93% of national polls overstated the Democratic candidate’s support among voters, while nearly as many (88%) did so in 2016.
Numbers, Facts and Trends Shaping Your World
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Acknowledgments
This report is made possible by The Pew Charitable Trusts. It is a collaborative effort based on the input and analysis of the following individuals. Find related reports online at: pewresearch.org/pewresearch-org/science. Primary research team Cary Funk, Director, Science and Society Research Alec Tyson, Associate Director, Science and Society Research Brian Kennedy, Senior Researcher Courtney Johnson, […]
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Acknowledgments
This report was made possible by The Pew Charitable Trusts. Pew Research Center is a subsidiary of the Pew Charitable Trusts, its primary funder. This report is a collaborative effort based on the input and analysis of the following individuals. Primary researchers Sono Shah, Computational Social Scientist Emma Remy, Data Science Analyst Aaron Smith, […]
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Appendix
In recent years, Pew Research Center has transitioned from probability-based telephone surveys to the American Trends Panel, a probability-based online panel. The transition from phone surveys conducted with an interviewer to online self-administered surveys brings with it the possibility of mode differences – differences arising from the method of interviewing. This appendix includes opinion measures […]
